Start with balance, not panic
Algae is a signal that light, nutrients, carbon, flow, and plant growth are not lining up perfectly. It does not mean your aquascape is ruined. Make one change at a time so you can learn what your aquarium is telling you.
Common types of aquarium algae
Brown diatoms
Dusty brown coating is common in new planted aquariums and may fade as the biological system matures. Wipe the glass, siphon what you can, and keep maintenance consistent.
Hair or thread algae
Long green strands often appear when light is strong or extended while plant growth and carbon availability are inconsistent. Remove as much as possible by hand, shorten the photoperiod, and improve circulation.
Green dust algae
A fine green film on the glass is usually managed with a steady cleaning routine and stable conditions. Avoid making several large changes at once.
Cyanobacteria
Blue-green or dark slimy sheets can be different from ordinary algae and may have a distinct odor. Remove affected material carefully, improve flow, and seek experienced help before using treatments around livestock.
A simple reset routine
- Take a quick photo so you can compare progress.
- Remove dead leaves and manually clear visible algae.
- Perform a consistent partial water change.
- Reduce light duration modestly if the tank is heavily lit.
- Check that flow reaches the corners without blasting plants.
- Wait several days before changing another variable.
San Diego aquarium note
Room temperature, daylight through windows, and the routine of your home can all affect a planted tank. Whether you are in Convoy, North County, South Bay, Orange County, or Baja California, the winning approach is the same: observe, stabilize, and make small repeatable changes.
Browse the AquascapeSD reference library, read the planted aquarium setup guide, or message the PetZoneSD / Hakkai team.